Has an AFL game ever ended 120-66?
Yes. AFL has seen a final score of 120-66 2 times. It first happened on August 22, 1959, when Melbourne beat Geelong, and most recently on May 26, 1996, when Fremantle beat Richmond.
That makes 120-66 the 2496th most common final score out of 6,649 that have ever occurred in AFL. One point away, 121-66 has happened never and 120-67 has happened 4 times. At one point the score disappeared for 37 years, between 1959 and 1996.